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Finding the Fourth Proportional to 520,046.90, 717,661.15 and 290,604.74

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Solution

The fourth proportional to 520,046.90, 717,661.15 and 290,604.74 is: 401,032.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,046.90 : 717,661.15 = 290,604.74 : x
  2. Step 2: Convert to fraction form
    520,046.90/717,661.15 = 290,604.74/x
  3. Step 3: Cross multiply
    520,046.90x = 717,661.15 × 290,604.74
  4. Step 4: Simplify right side
    520,046.90x = 208,555,732,971.49
  5. Step 5: Solve for x
    x = 208,555,732,971.49/520,046.90
  6. Step 6: Final answer
    x = 401,032.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.